Temperature sensors are used to measuretemperature of gases or liquids using thermocouples and thermoresistors.
Temperature transmitters measure temperature value from temperatures sensors (thermocouples, RTD, etc) and transmits the data in voltage or current
Pressure sensors are devices used in a variety of applications requiring precise and accurate pressure measurement of gases or liquids
Pressure transmitters measure pressure of gas or liquid and transmit the measurement data in 4-20 mA signals